Securing and tightening bolt.



R. C. LlVESAY.

SECURING AND TIGHTENING BQLT. APPLICATION FILED FEB. 7. 1916.

1,246; 122. Patented Nov. 13, 1917.

W-TE EE-Q I I UNITED ATENT FICE-1 B QBEBTX c}, rites-Ag, on ivronrrrnrnnmors, ASSIGNDR 'ro DE RE A -1\TD .coMP NY, {on 3 moLrnnr-Lnrivors, A.CORPORATION or ILLINOIS. c.

1 sizicunnve.nivnrrerrrnivnve 'Bo 'rf i specificationof Letters Patent.v

-App1ication filed February 7, 19 16. Seria1=Nos7668I Ta al'lwhom-itmayconcern? l Be it known that-I-," 'Ronmrr C. LIvEsAr, a citizen oftheUnited-States, residing at Moline, lin the-county oil-1 0k Island andState of Illinois, have invented certain new and useful Improvements inSecuring and Tightening Bolts, of which the following is aspecification,reference-being had: therein to the accompanying-drawing."q

My invention relates more particularly to means employed: to secure" toshafting, or the like, other mechanical parts in such'a manner that anystrain resulting ismore evenly distributed and shearing action prac,tically eliminated, as will be more clearly set forth hereinafter;

Referring to the drawing- The figure is a sectional view of a gear wheelsecured on. a shaft in my improved manner. p

As illustrated 1 is a shaft and 2 is argear wheel in section mountedthereon and secured in place by a bolt or pin 3 which ex 7 tends througha perforation 4: in the hub 5 ofthe gear wheel 2 then through aperforation 6 in the shaft 1 and a perforation 7 in the hub 5, the endof the bolt 3 being threaded to. receive a nut 8 by which the bolt 3 isheld in place.

The bolt 3 is formed with a head 9 adapted to fit freely inthe'perforation 4:; from the head 9 the bolt 3 is frusto-conical inform, the base being of a smaller diameter than the head 9 so astoprovide a shoulder 10 whichis adapted to contact with the shaft 1 whenthe bolt 3 is driven fully into place, as shown in dotted lines in thedraw-f ing. The diameter of the perforation 6 in the shaft 1 and of theperforation 7 in the hub 5 is sufficient'topermit the straight portion11 of the bolt 3 to pass freely therethrough, the diameter of theperforation 6 being the same for the entire length of the latter. .7

In mounting a sleeve, a collar, or other part, or, as shown, a gearwheel 2, on the shaft 1, the perforations 4, 6 and 7 are alined and thebolt 3'is inserted and driven through until the threaded portion thereofof the perforation 6.

is projected from theperforation 7 a sufficient distance for placing thenut, 8 thereon; at this time the conical portion of the bolt 3 isincontact with the adjacent edge Continued driving of the bolt 3 willforce the conical portion thereof into the perforation 6 spreadingthatPas -tenet. .13, 191

part oiit in-contact with the conical portioirof-"theboltt 3, and"causing a swellingpr up setting of the surrounding metal of the shaft'1, forcing it against the adj acentinner surface. of the hubl'z'),materially reducing anypossible shearing action against the-bolt andsecuring theshaft 1 "and gear wheel 26 more rigidly together theshoulder IO contacts with the shaft 1 and limits the distame the'conicahportion of thebolt 3 can tain the head 9. of the bolt 3 in tion4 of the hub 5. V

, The bolt 3 having been driven in until the shoulder 10 contacts withthe shaft 1, the nut 8 is turned until it is jammed against shaft 1 withconsiderable force. In the common use of tapered bolts, whethertabe-drawn into the perforation 6 so as to re theperforathe hub 5-,andcannot be turned further, pressing that side of the hub 5 against the rpered for their entire len h or for a portion of it only, theperforatlons in which such quently, the advantages ofmy device, as shownand described, are not'present.

What I claim is 1. In a device of the class described, a

"bolts are employed mu'stbe reamed, conse-' shaft or the like having atransverse, perforation for the reception of a bolt, a memes 7 berencircling the shaft to be securedthereto} o i and having oppositeperforations to register T with the perforation in the shaft, a boltadapted to be driven through the perfora foration for the reception of abolt, a member encircling the shaft to be secured thereto and havingopposite perforations to register with the perforation in the shaft, abolt adapted to be driventhrough the perforations in saidmember andshaft to hold the two together, said bolt having means to upset themetal of the shaft adjacent the perforation therein and in contact withsaid member when the bolt is driven into place.

3. In a device of the class described, a

shaft or the like having a diametrical per-, foration for the receptionof a bolt, a mem ber encircling the shaft to be secured thereto i andhaving a perforation similar in diameter to the perforation in the shaftand registering therewith, a perforation in the opposite side of saidmember of greater diameter than the perforation in the shaft, a headedbolt adapted to be driven through the perforations in said member andshaft to hold the two together, the head of said bolt fitting Within thelarger perforation in said member, the bolt having means adjacent thehead thereof to upset the metal of the shaft adjacent the perforationtherein and the larger perforation in said member, When the bolt isdriven into place.

a. In a device of the class described, a shaft or the like having adiametrical perforation of one diameter for the reception of a bolt, amember encircling the shaft to be secured thereto and'having aperforation similar in diameter to the perforation in the shaft andregistering therewith, said member having a perforation on its oppositeside of greater diameter than the perforation in the shaft, a headedbolt adapted to be driven through the perforations in said member andshaft to hold the tWo together, the head of said bolt fitting Within thelarger perforation in said member, said bolt being frustoconical inshape adjacent the head to upset the metal of the shaft against which itis driven and to force said upset metal against said member. 7

In testimony whereof I alliX my signature, in presence of two Witnesses.

ROBERT C. LIVESAY. lVitnesses JEssIE SIMSER, WV. G. DUFFIELD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. (1.

